Light-weight aggregate produced by using coal gangue

Abstract

The invention aims to provide a production method of a light-weight aggregate used for industrial and civil buildings, and in particular relates to the light-weight aggregate produced by using coal gangue. The light-weight aggregate is characterized in that a production raw material of the coal gangue light-weight aggregate is unburned coal gangue; the coal gangue is selected from mining gangue or washing gangue of a coal preparation plant; the particle size range of the coal gangue light-weight aggregate is 0.16-40mm; the coal gangue has a certain heating power, and the caloric value is 1-6276KJ / Kg; the coal gangue is crushed into particles with the particle size of 0.16-40mm, is put into a rotary kiln, and then is subjected to thermal activation at the thermal activation temperature of 650-1250 DEG C.

Description

technical field [0001] The invention relates to a production method of light aggregate for industrial and civil buildings, in particular to a light aggregate produced by using coal gangue, which belongs to the field of solid waste treatment and resource utilization. Background technique [0002] With the continuous development of coal production, the output of coal gangue is increasing day by day. More than 100 million tons of coal gangue are added every year, and the accumulated coal gangue has exceeded 3 billion tons over the years. It covers an area of ​​more than 50,000 mu and has formed more than 1,500 large-scale gangue Mountain. Such a large amount of coal mine waste not only occupies a large amount of land and causes serious pollution to the environment, but also a waste of resources. Do a good job in coal gangue treatment and resource utilization, and use coal gangue to produce industrial and civil building light aggregates, which will not only create social benefi...

AI Technical Summary

Problems solved by technology

[0004] The disadvantage of the spontaneous combustion coal gangue aggregate production method is that the pozzolanic activity of coal gangue aggregate cannot be controlled during the spontaneous combustion of coal gangue, and the activity is relatively low.

Because the coal gangue is exposed, the water content cannot be controlled, and the water content of the light aggregate produced cannot be guaranteed.

[0005] At present, there is no industrial production of light aggregates for industrial and civil buildings using non-spontaneous coal gangue in China.